Answer:
To release the nutrients inside of it
Explanation:
Adenine and thymine pair up. Just remember ATCG in that order, showing that adenine and thymine pair up, and so do cytosine and guanine
Since this is movement that is occurring against the natural movement from high to low concentration, this is Active transport.
The option C.
Sea level - 100%
mid-level elevation - 4500M and 57%
Peak - 8850M and 33%
Supply oxygen to cells for cellular respiration.